Preparation and properties of rare-earth containing oxide fluoride glasses

The preparation of the rare earth containing oxide fluoride glasses LnF3 (Ln; Y through Lu)–BaF2–AlF3–GeO2 in which the nominal content of LnF3 reached 60 mol% in maximum and their basic properties such as density, refractive index and glass transition temperature were investigated and summarized in detail. Especially, in order to discuss the local structure around the rare earth ion in the glass, the Judd–Ofelt analysis (discussion with Ω parameters) of the HoF3–BaF2–AlF3–GeO2 glasses was carried out. The unique fluorescent behavior and the magnetic properties of LnF3–BaF2–AlF3–GeO2 glasses (Ln = Tb and/or Sm) were also studied.